... kitten, all neutered as kittens. They are all adults now. Observation: On rare occasion, the males will attempt to mount the female. There is no copulation taking place (in fact the males look rather clueless, as if not knowing what to do next), but the motions of grabbing the female by the scruff ...

... or barb-ready state is simply not compatible with the non-barb-receptive/non-barbed state. On one hand, if you have a barbed penis attempting copulation with a non-barbed vagina, you have a whole host of issues that are not present in non-barbed/non-barbed-compatible copulation, for obvious ...

... laboratory workers on plants, bees. Remora encroached entirely in the sex organs of bigger fish or bathing terrestrial mammals is seen. The very copulation, at the giant bodies, with these enormous tails, would be difficult on dry territory. Why cannot now the shores of the water basins maintain ...

It would be releated to the organism's response. As humans mating or copulation biologically is needed for the perpetuation of the species. By Maslow's hierarchy of needs, sex is a physiological need. Remeber one of the organism's basic attributes of life ...